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目的 :探讨正常心包横窦的MRI表现。材料与方法 :选用正常成人胸部连续断层切片解剖标本4例。收集无心包病变患者MRI图像21例 ,结合解剖所见 ,分析MRI上横窦的形态、大小和毗邻关系。横窦分为前垂直部、中间水平部及后垂直部。结果 :本组76.2 %(16/21)病例MRI显示横窦。横轴位上在升主动脉及肺动脉干与左房之间可见横窦前垂直部 /及中间水平部前分 ,其中9例(42.9 %)在冠状位上可见横窦中间水平部。均呈T1、T2 低信号。本组52.4 %病例MRI可显示左冠状动脉 ,可见其连于升主动脉左后侧壁。结论 :MRI能较清楚地显示横窦前垂直部与中间水平部 ,后垂直部不易显示 ,同时也可显示左冠状动脉。
Objective: To investigate the MRI findings of normal pericardial transverse sinus. MATERIALS AND METHODS: Four cases of normal adult chest thoracic dissection specimens were selected. Twenty-one MRI images of patients with uncorrected pericardium were collected. According to anatomical findings, the morphology, size and adjacent relationship of transverse sinus on MRI were analyzed. The transverse sinus is divided into a front vertical section, a middle horizontal section and a posterior vertical section. Results: 76.2% (16/21) cases of this group showed transverse sinus. In the horizontal axis, the anteroposterior vertical part and the anterior horizontal part of the transverse sinus were seen between the ascending aorta and the pulmonary artery and the left atrium. Nine of them (42.9%) showed the horizontal part of the transverse sinus in the coronal plane. All showed T1, T2 low signal. This group of 52.4% of cases MRI can show the left coronary artery, showing its connection in the left posterior wall of the ascending aorta. Conclusion: MRI can clearly show the horizontal part of the anterior and posterior transverse sinus, the latter part of the vertical is not easy to display, but also can display the left coronary artery.